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Wildlife experts are warning about a highly toxic caterpillar, which is spreading across parts of the UK.

In their caterpillar stage, the Oak Processionary moths can cause rashes, asthma, vomiting and fever.

Craig Harrison, the Forestry Commission London manager warned "don't touch hairy caterpillars" to avoid being struck by the mini-beast.

This clip is originally from 5 live Breakfast on May 4 2016.